Die press



Oct. 14, 1941. A. NOVICK ETAL DIE" PRESS Filed Oct; 18, 1939 2 SheetsSheet l INVENTQVR Abraham lvoylc/r and Dame/ Nor/ck BY w ATTORNEYS Oct. 14; 1941 ov|c r DIE PRES S I 2 Sheets-Sheet 2 Filed Oct. 18, 1939 ATTORNEYS Patentecl Oct. 14, 1941 UNITED STATES PATENT- OFFICE DIE PRESS Abraham Novick and Daniel Novick, Flushing, N. Y., assignors to F. L. SmitheMachine 00., Inc., New York, N. Y., a corporation of New York cutting paper or other sheet material arranged in stack form, by forcing a die through the stack.

In accordance with a common practice of the prior art provision is made of a machine known as a standard die press which comprises a continuously reciprocating plunger head or ram driven from a shaft which is equipped with a heavy fly-Wheel. The operator places the stack of sheet material upon a cutting board, places the die in a desired position upon the stack, and then, while the head is in the upper range of its movement, thrusts the board with the supported stack and die under the head so that, the die will be driven through the stack by thehead upon the next descent of the head. The operator then withdraws the board with the supported stack and die from beneath the head, as

the head moves upward away from the stack, and before the head has had time to descend a second time. The operation is repeated after a short period, depending upon the time required by the operator to remove and dispose of the cut blanks and to effect a fresh arrangement of board, stack and die. I

This procedure is laborious for the operato and requires skillful timing on his part. 1 He must be careful to get the die under the head at the right moment. He must also be careful to have the die fully under the head, for the die is likely to be broken if it is only partly under. There is another disadvantage to this operation, and that is the element of danger for the operator. He must be extremely cautious that his fingers do not become caught under the cutting head.

As an alternative to the above practice it has been proposed to dispense with the continuous operation of the plunger head and to effect a mechanical organization whereby the operator, when he has produced the desired arrangement of cutting board, stack and die, may initiate a mechanically controlled cycle of operations in which the board is first carried inward to locate the die under the head, the die is then caused to descend and return, and the board is withdrawn. A mechanical organization of this kind has clear advantages over the standard die press in that it obviates the stated drawbacks, but it also lacks certain advantages of the standard die press, principally because of the discontinuous operation of the plunger head.

In the standard die press the inertia of the constantly running fly-wheel contributes substantially to the rapid movement of the plunger head toward the die and to the driving of the die through the stack. This reduces the peak power load and enables the operating parts to be made of relatively light and inexpensive construction. The fly-wheel, moreover, is constantlye coupled with the plunger head so that there is no need for a heavy duty clutch for initiating and efiecting operation of the plunger head, nor

.of apowerful brake for arresting the plunger head at the conclusion of an operation.

It is an object of the present invention to provide a mechanism which combines all of the advantages of both of the priorstructures referred to, and which does not have any of the disadvantages of either of them.

To this, end, it is a feature of the invention that provision is made of fiy-wheel mechanism for constantly operating a plunger head, in combination with a mechanically operated cutting board actuating mechanism adapted to be rendered operative manually at the will of the operator, and arranged when so rendered operative to carry out a single cycle of cutter board operations in mechanically synchronized relation with the cycle of operations of the plunger head.

The mode of operation is such that the cutter board carriage or table is caused to advance and to locate the die squarely beneath the plunger head while the plunger head is in the upper range of its movement, then to dwell until the plunger head has descended to drive the die through the stack and has again started upward, and finallyto return to the starting or normal position where it will remain until the operator is ready to initiate a repetition of the cycle.

In a practical and advantageous embodiment of theinventiomand as illustrated herein, electrical means are provided for effecting and controlling movements of a cutter board carriage, such means comprising an electric motor and an appropriate switch mechanism .for controlling the motor. The switch mechanism comprises a manually operable switch which is not, itself, capable of setting the motor into operation, but which so alters the motor control circuit that other switch mechanism operated in timed relation with the plunger head may be effective to produce the described, timed cycle of operations of the clutter board carriage.

Other objects and advantages will hereinafter appear.

In the drawings forming part of this specification:

Fig. 1 is a fragmentary View in side elevation,

partly broken away, illustrating a machine embodying the invention;

Fig. 2 is a fragmentary View, in section, of the upper part of the machine showing the switch and its actuating mechanism; and

Fig. 3 is a diagrammatic view'illustrating a mechanical and electrical means for controlling the operation of the cutter board carriage operating motor;

The illustrated machine, which includes substantially the structure of a standard die-press, comprises a frame l. Theframe l supports a press bed 2 upon which a table 3' is slidingly supported. A plunger head 4 is mounted for vertical reciprocation between suitable frame-carried guides 5 and 6, and is reciprocated in the guideways by links 1. The links I are pivotally 'connected at their upper ends to the plunger head 4 through pins 8. The loWerendfofeach-link is journaled upon an eccentric'pin 9 -which -is carried by a driving disc |E| fast with a driving shaft I.

The shaft I is constantly driven "from a'b-elt"|2 through suitable transmission mechanismcomprising a pulley |3 and a gear l4, both fast upon a shaft H5. The gear M'drives "alarger-gear "l6 fast upon a'shaft H. The sh'aftl'l also-has fast -uponit a'smaller gear |-8 which drives 'a' large gear 19. construction to serve as a fly=wheel 'for storing energy and for stabilizing the 'rotationtof the shaft Thebelt -|2is "operated continuously '-and-atsubstantiallyconstantspeed; and as a 'the' plunger head driver, or simply "as the driver.

The table '3,in thep'osition'shown in-Fig. 1,

--otally mounted in the frame brackets 43.

' carries-atone end an adjustable switch operat- 'ing pin 45.

The tail of the lever is normally drawn downward to hold the pin 45 and the arm 4| in raised position as illustrated in Figure 2,

' by 'means'of a tension spring 48, which spring 'is connected at one end to a pin 41 carried by the tail of the lever and at the opposite end to a pin48 carried by a frame member 4t. When the arm-4| is-depressed-the-pin 45 presses against The gear 9" may be made 'ofmassive v a switch operating button 50 to move a contact member 5| into switch-closing position. The

' position'illustrated in Figure 2.

" consequence the plunger head' l is 'reciprocated.

The closing of-theswitch member 52- does not 'ne'c'essarily'set themotor 29 into immediate 0p- 'eration; but the'closing of-this switch member is a" condition precedent-tothe'startingof the-motor for carrying out" a single complete cycle of rests in part uponsupporting rollers '20'which are 1 on the table. 7 In the loading position, as illustrated in Fig. 1; asheet stack 23 is placedfup'on'the cutter board 22 and a hollow 'die24 is placed in a'select'ed position'upon the stack 23. Itis thefun'ction of the 'cutter board carriageto supportthe cutter-board I in this loading position','tocarry the'butter'boai d into position'tolocat'e the die 24isqu'arely under the plunger head"4 so that the die will be driven through'the' stack upon descent of theplunger head; and then to return the cutter board, the.

stack and the die to the initial position 'while'the"-' plunger head is inthe upper range -of.its movement and before it can descend a secondtime.

'The table or carriage" 3 is provided withears 25' through which itis pivotal'ly connected to' the right hand ends of links 26. l The left handen'ds' of the links 26 are pivotally connectedto rocker arms 21 which are fast upon a rock shaft 28. As the arms 2'l-move toward the left the-table 3isdrawn toward the left from the positionillustrated in Fig. 1 to the die cutting position and as the arms move toward the right the table is returned to the'position of Fig. 1.

"A' motor '29 is provided-for operating the arms "21, this motor being normally idle and inoperative and having-its shaft -30 normallyheld against rotation by a brake mechanism 3|. When the motor 29 is rendered operative and is set into operation the motor shaft 30' acts through a pulley -'32'fast onthefshaft 30and a belt/-33 to drive apulley '34rwhich' isfast upon a shaft 35. The shaft 35 hasfastiupon it a worm '36 whichvmesheswiith vand drives a worm gear KSTifastupon a'shaft' 38. The shaft38 has fast upon it cranks- 39 eachof Which is connected througha unk an toone of the arms 21. As illustrated Figurel, the table 3 is-at the righthand-limit of its movement. A half revolution'of the worm gear 31 will carry the tableto' its left- -sand -limit of "m0vement,'whi1e a further half the table3 throughoperation-of the motor 29, and it is effective tocause' such a cycle to ensue. The motor "29 may be of any suitable type, but

"is illustrated "as a three-phase motor adapted to receive its current supply-from three line conductors 53, -54 'and"55.

Upon'the'closing of the switch member 5|, a circuit is established from the conductor 54 to the conductor955. The .conductor '54 is connected through conductors "56 and Fal'with the switch member 5 and the "switch member '5| is in turn'connected'through a conductor 58 with an electromagnet 59. The electrom'a'gnetilais .connected through a'con'ductor 6|l'with a' switch member 6| and thence through conductors 62 and 63 with'the 'line conductor'55. 'The'effect Jof'closing'this 'circuit'is'to energize the. electromagnet'.59,which'pulls a'stick'switch member'fi l into engagement with a contact 65 of conductor "58, and alsoi'pulls a sWitchLmember 66' into engagement with acontact '61 of a conductor 68.

tion of the conductor 58. "self-maintained so that the contact 5| is' notre- .quiredtoflbe held for any'substantiallength of As soon asthe switch member fi l'engages the conta'ct'65, a path from the conductor'fifiito the electromagnet 59. in parallel with the "switch rriemb'er'5| is established through a'conductor 69, the switch member 64, the contactiiidand a por- This new circuit is time in the closedposition.

1 The "effect of the establishmentand maintenance of the described circuit is. to maintain the switch member 56 in engagement. with the open positions illustrated'in Figure 2, but which are adapted to be pressed to circuit closing'po- 'sitions by cams .14 "and 15,1respectively,':both of whichare fast upon' the constantly rotating shaftll and are,"t'h'erefore, constantlypoperated by'the driver.. The iswitch'm'emberslll and 12 are moved to closed positions simultaneously by thecams I4 and I5. The switchmember I2 is held engaged only for an instant, but the switch member in is held engaged for a longer period for a purpose which will be made clear presently.

The closing of the switch members I0 and i2 establishes a circuit from 54 to 55 as follows: From 55 through a conductor I6, contact I3, switch member I2,'conductor II, electromagnet 78, conductors I9 and 68, contact 61, switch member 66, conductor 80, contact II, switch member I0, conductor BI and conductor 63 to line conductor 55.

The energization of the electromagnet -78 closes the switch members 82, 83, 84 and 85 upon contact 86, 81, 88 and 89, respectively.

The engagement between switch member 2 and contact I3 is maintained for only an instant, so that the circuit just described is not maintained. The closure of the switch member 85 upon the contact 89 establishes in its place a circuit for maintaining the electromagnet 18 energized. This circuit comprises the conductor 54, conductor 76, contact 89, switch member 85, conductor 11, electromagnet I3, conductors I9 and 68, contact 61, switch 66, conductor 89, con tact Ii, switch member I9, and conductors BI and 63 to line conductor 55.

The closing of the switch members 82, 83 and 84 connects conductors 90, 9| and 52, respectively, to the line conductors 53, 54 and 55. The conductors 99, 9| and 92 are connected to the three-phase winding of the motor 29, and set the motor into operation. At the same time a circuit is established from conductor 9| through a conductor 93, an electromagnet 94, and a conductor 95 to conductor 92. The electromagnet armature 96 is connected to a lever 91 fulcrumed at 96. The lever is connected through links 99 and I9!) to brake shoes I DI and I52 which are pivotally mounted at I83 and I94, respectively. A spring I941]. normally draws the shoes I6I and I52 toward one another and against a brake drum IMb fast on the motor shaft 30. Both shoes are moved away from the drum IMb by the lever 91 upon energization of the electromagnet 94.

The rotation of the motor is eifective through rotation of the worm wheel 31, as previously described, to move the table 3 toward the left. The worm wheel 3! is fast upon the shaft 38, and this shaft also has fast upon it four switch controlling cams I85, I66, I01 and I98. At the starting of the motor as just described, the switches controlled by the cams I96, I87 and I88 are held open, but as already described the switch member 6I controlled by the cam I55 is in a closed position.

The period of contact or closure of the switch member I9 under the influence of the cam M on the shaft II is of limited duration. Before the switch member It! is permitted to move to open position, however, the high part of the cam I08 travels out of engagement with a switch member I69 which it controls, permitting the switch member to engage a contact IIfl of a conductor I I I. This insures that a circuit will be maintained through the electromagnet I8 even after the switch member I8 has been permitted to move to its open position. A circuit through the relay I8 is now established and comprises line conductor 54, conductor I6, contact 89, switch member 85, conductor 11, electromagnet l8, conductors I9 and 68, contact 6], switch member 66, conductors 89 and III,

contact H0, switch member I 09 and conductor 63 back to line conductor 55. The closed periods of the switch members I9 and I89 are over lapped somewhat, but the construction and are rangement aresuch that the cams I4 and I98 are caused to produce a combined closing period of the switch members I9 and IE9 for 180' of revolution of the shaft 38, or, in other words, until the table 3 has been moved to its extreme leftward position as illustrated in dot and dash lines in Figure 1. At that point the high part of the cam I88 will engage the switch member I09 and move it out of engagement with the contact III thereby breaking the circuit just described.

The ratio of rotation of the shaft II to the shaft 38 is such, when both shafts are operating, that the cam I4 will not have attained a position to reestablish engagement of the switch member I9 with the contact II at the time when engagement of the switch member I99 with the contact III] is broken. Disengagemen-t of the switch member I89 from the contact I I9, therefore, terminates energization of the electromagnet I8 and permits the switch members 82, 83, 84 and to return to the open condition il1ustrated in Figure 2.

Simultaneously with the breaking of the circuit through switch member I09 the circuit of the stick relay 59 through switch member GI is broken by cam I85. The switch members 64 and 66, therefore, move to open position at the same time. The motor having been energized for a portion of a cycle of the plunger head is now deenergized for the remainder of the cycle of the plunger head 4, or until the plunger head has descended and has again reached the point in its upward movement at which energization of the motor first occurred. During this time the shaft 38 stands idle, and hence the switch controlling cams which it carries stand idle substantially away from the positions in which they are illustrated in Figure 2. The shaft II during this idle period of the shaft 38 continues to rotate, however, and when it has traveled through 360 from the position in which the switch memberslfl and I2 were first closed, it causes the switch members it and '12 to be moved again to closed positions. While such closure would normally have no effect with the cams on the shaft 38 in the illustrated position of Figure 2, unless the arm iI had been previously swung to close the switch member 66, it does have the effect of again starting the motor when the cams on shaft 38 are in the positions which they occupy at the end of the first half cycle of the table 3. Thus, the closing of the switch members I9 and I2 establishes a circuit through the electromagnet I8. This circuit comprises line conductor 54, conductor HS, contact 13, switch member I2, conductor IT, ele'ctromagnet 78, conductor I9, a conductor H2, 2. switch member I i3 (controlled by the cam I96), a conductor II4, conductor 89, contact II, switch member I8 and conductors SI and 63 back to line member 55.

As before, the switch member I2 remains effective for only an instant, but the engagement of switch member 85 with contact 89 through energization of the electromagnet [8 serves to replace conductor I6, contact I3 and switch member I2, and to maintain the flow of current through the relay I8. As a result of the second phase of operations thus far described the line conductors 53, 54 and 55 are again connected to the motor, the brake-is "released and the motor is started-into operation. I

At the time when the' motor isthus started f or a second-time,-a-switch-member I I5 controlled by the cam10lis-he1d open bythecami Ashort time afterward, however, and-before-the cam 14 has permitted the switch member 10 to open,

' the cam Jill-permitsthe switch member- H5 to engage a contact H 6 of a conductor H'I.- This establishes aficirouit from line conductor -54,

through conductor 16, contact 89, switch member 85; conductorT'L-relay 18, conductors l9 and H2, switch member H3, conductors -l I4',-80and Hl, contact H6, switch member H5,.and-con ductors, 62 and 63 back to line conductor;55.

These connections'are then maintained until the second operation'of the-motor 29 hascarried the shaft 33 through 180; whereupon the cams'l06 and I simultaneously movethe switch members I i3 and H to open position. and the-opera-.

tion of the motor isarrestedwith the "table-and all :of the motor operatedpartsdn their initial positions, namely, the positions-"in gwhich 'they are illustrated in; Figures '1- and *2.-

The shaft H 'willcontinue to-turn'and periodically to close the switchmembers'fifland, but in the illustrated condition of --thje "parts this can have no effect because'there'is noway of completing a circuit through'the 'elect'romagnet l8 without first energizing'theelectromagnet i'aa,

through closing of the contact'memberfil.

The principle of operationv of the electrical control mechanism can now be more clearly expressed by meansof. a brief recapitulation. The

motor operating switch"82-1 83'=84 'is controlled;

by the electromagnet "It. The electromagnet i8 is included in a first circuit comprising four sectionswhich are series'connectioned to one another. The first .ofthese. sections comprises the driver operated switch 10 and the motor operated with the switch '12, theistick switch being responsive to energization of the electromagnet 18.

'In parallel withthis first circuit means there" is provided an auxiliary "circuit means consisting of three sections which are connected in series with one another. The first of these sections comprises the motor operated-switchfil which must be closed in order for theauxiliary circuit.

means to-be closed. The second sectionincludes the electromagnet 59 for .iclosingxthe switches 64 aud ts and for. retaining them in a closed condition.

The cthird section include the manual switch 5| and also. the-stick switch 64 in parallel with the'manual switch 5!. The sole purpose of the auxiliary circuit means :is. toclose .the switch. 66

when the motor-isin its normal idle condition, and to maintainit closed until it "has been replaced bythe closing-of themotor operated switch H3.

The closing offthe switch 5|, when the switch 6| stands closed as it does in the normal idle-conjdition of the motor, .is efiectiveto "close -the -in-to operation.

12 toclosed positions by the driver operated cams 14 and 15 is not an idle operation, but

- serves at once toenergize the electromagnet 18 and-therebyto close the motor operating switch -82-83--84, and also the stick switch 85 which is in parallel with the driver operated switch 12.

Shortly after the rotation of the motor is initiated, the motor operated cam 168 turns to a. position to cause the switch I99 to be closed so that it will be available to replace the switch "ii! in the circuit uponmovement of the cam 14 into position to permit the switch 18 to open. At the end of the first half cycle of motor operation the cam 186 is operated into position to cause the switch H3, in parallel with the switch 66; to be closed;-so that the switch 56 is no longer necessary to the v energization of the electromagnet 13, and hence is no longer necessary to the operation of the motor. Substantially simultaneously with the closing of the switch 'I 13, the cam 165 'is operated by the motor to a position to 'open the 'switch' 6!, so that the entire auxiliary circuit is'deenergized andthe switches 64 and 6B are caused to open'through deenergization of the electromagnet '59. From this point onward neither the auxiliary circuit nor the switch, 656 performs any function in the cycle whichhas been begun.

, Simultaneously withthe opening of the switch SI and the closing of'the switch 63, the cam I08 operates the switch N39 to. open position. Since the switch 10 is not at this time closed, and the switch H5 has not yet been closed, the electromagnet 18 is open circuited because of the absence of. any closed connection across the first section of the circuit means in which the electro- .magnet 13 is included. The second section of switch 66 and to maintain the switch-66- c1osed* such circuit means is closed, however, because the. switch 1 i3 stands closed.

As soon, therefore, as'the driver operated cams M and '55 again reach the positions for closing the switches l0 and l2,'the circuit through the .electromagnet 7 T8 is again completed. This startsthe second half cycle of operation. Before the switch 18 is, permitted to open by the cam '14, the cam I01 .will have been operated into position .to cause the switch H5 to close. The operationof the motor will, therefore, be continued ;so long as the switches I H5 and H3 remain closed. These switches are 55.

simultaneously openedby the cams H36 and I 07 upon the completion of the second half cycle of motor operation, so that the motor operated parts all come to rest atithe .endofthe second half revolution of the shaft .38, the partsbeing all restored tothe positions in-which they are illustrated inFigure 3. In these positions the switch 65 is closed, but the switchesv H3, H5 and 19 are open.

It .is evident from ,what. has been said thatthe table operating motor will remainidle until the switch member 5! is manually closed, and that even then, it will continue idle until the cams "Hand '15 move the switch members "16- and "52 to closed position. This phase ofthe cams idand- '15 occurs on the up stroke of'the plungerhead in the'neighborhood of 30 after the plungerhead has reached itslowestposition.

The table is then given its-full-movement toward the left during the next ensuing half cycle (more or less) of theplunger head. 'Thetable then rests in that position during-the remainder of a complete cycle of the plunger head,'and is again operated to restore it to its initial position during substantially the same phase of the ensuing cycle of the plunger head in which it Was operated for the leftward movement. As soon as the table has been restored to its initial position, it is ready for a repetition of the described operation at any time that the operator may desire, and such repetition is brought about by the mere momentary actuation of the arm 4!.

It is apparent that the mechanism as described relieves the operator of all manual labor in connection with the actuation of the table, that it also relieves him of the necessity for timing operation of the table relative to the plunger head, and that it obviates all hazard to the operator.

It is also apparent that these objects are attained without sacrificing the advantages which accrue from the continuous operation of the plunger head and its associated fly-wheel.

It is a further feature of the present invention that the cutter board 22 simply rests slidably upon the table 3 without attachment theretoof any kind. As a consequence of this arrangement, the operator is free to shift or turn the cutter board relative to the table 3, or to remove it from the machine. This is a point of substantial advantage since an operator who has a long stack 23 to deal with can very readily adjust the cutter board to a position to cause the die to come properly under the plunger head upon operation of the table to the die cutting position.

We have described what We believe to be the best embodiment of our invention. We do not wish, however, to be confined 'to the embodiment shown, but what we desire to cover by Letters Patent is set forth in the appended claims.

We claim: 7

1. A die press comprising, in combination, a plunger head, continuously operable rotary means for continuously reciprocating the plung- .er head, a sheet supporting table cooperative with said head, means for mechanically efi ecting a single complete operating cycle of the table which consists of moving the table from a position clear of the plunger head to a position beneaththe plunger head and back to original position, said means being normally maintained inoperative, a manually operable control member for rendering the table moving means operative, and means for causing the operation of the table moving means to be controlled in its timing by the plunger head operating means.

2. A die press comprising, in combination, a plunger head, continuously operable rotary means for continuously reciprocating the plunger head, a sheet supporting table cooperative withv said head, means for mechanically effecting a single complete operating cycle of the table which consists of moving the table from a position clear of the plunger head to a position beneath the plunger head and back to original" position, said means being normally maintained inoperative, a manually operable control member for rendering the table moving means operative, and means for synchronizing the operating cycle of the table with the operation of the plunger head.

3. A die press comprising, in combination, a plunger head, continuously operable rotary means for continuously reciprocating the plunger head, a sheet supportingtable cooperative With said head, means for mechanically effecting a single complete operating cycle of the table which consists of moving thetable from a position clear of the plunger head toa position beneath the plunger head and back to original position, and means for controlling the production of a table operating cycle comprising two control devices, the first a manual control device for establishing a condition precedent to the initiation of a table operating cycle, :and the second a mechanical control device operated cyclically by the plunger head operating means in timed relation with the operation of the plunger head for establishing a concurrent condition precedent to the initiation of a table operating cycle, and for thereby initiating the table operating cycle at a predetermined point in the cycle of the plunger head.

4. A die press comprising, in combination, a plunger head, continuously operable rotary means for continuously reciprocating the plunger head, a sheet supporting table cooperative with said' head, means for mechanically effecting a single complete operating cycle of the table which consists of moving the table from a position clear of the 'plunger'h'ead to a position beneath the plunger head and back to original position, said means being normally maintained inoperative,

a manually operable control member for rendering the table moving means operative, and

means under the control of the plunger head operating means and efiective after operation of the manually operable control member to initiate a table operating cycle at a predetermined point in the up stroke'of the plunger head.

5. A die press comprising, in combination, a plunger head, continuously operable rotary means for continuously reciprocating the plunger head, a sheet supporting table cooperative with said head, means for mechanically efiecting a single complete operating cycle of the table which con: sists of moving the table -from a position, clear of the plunger head to a position beneath the plunger head and back to original position, said means being normally maintained inoperative, a manually operable control member for rendering the table moving means operative; and

meansunder the control of the plunger head operating means and effective after operation of the manually operable control member to initiate a table operating cycle at a predetermined point 'inthe up stroke of the plunger head,;said table operating means comprising means to cause the table first to be -moved fully beneath the plunger-head duringa portion of a cycle of the plunger head, then to rest during the remainder ofsuch plunger head cycle, then to be returned to the'original position during a portion of the ,ensuing cycle of the plunger head, and finally to rest until after the next operation manually operable control member.

6. A die press comprising, in combination, a plunger head, a stack table, means for continuof the :ously operating the plunger head in accordance with a prescribed cycle, means for mechanically operating the stack table through a single prescribed cycle, said table operating means being normally maintained inoperative, manual mean for rendering said table operating means operative, and means for synchronizing the operation of the table with the operation of the plunger head.

7. A di'e press comprisin in combination, a

plunger head, a stack table, rotary means for continuously operating; the plunger head inaccordancewitha prescribed cycle; means for; mechanically operating the -stack table at the will of the operatorthrough a single prescribed cycle in which the tab1e-is caused to travel first'in one direction to carry'a stack'from aloading position into a position-under the plunger head and" then in the opposite direction toreturn the stack -tothe original position, said table operating'means comprising-an electric motor, a con trol-means-for th motor comprising a rotary member operated 'bythe motor; arfirstmanu allycontrolled switch to: render the motor operableya second switch meanscontrolled by the plunger head operating; means tostart the motor at a definite-pointi-in the-plunger =head cycle;

and a third" switch means' controlled by said motor-operated rotary mem-bento control 'theduration of an operation.

8. -A--die press comprising, in icombinationa plunger head',--a-.staolc-table; rotary means-for continuously operating-the plungerhead'in accordancewith a prescribed cycle-, means for mechanically-operatingthe-stack table at the" will ofthe-operator-through a single prescribed cycle in which the table iswcausedrtotravel first in one direction to 1 carry a stack from a loading position into a position under the plunger head 4 and then inthe opposite direction-toreturnthe stack to thee original position, said tableoperatingmeans comprising anelectric motor, a control means for'themotor comprising arotary member. operated vby-the-motor, a first manually controlled switch to: render, the motor operable;- a I,

secondswitch -m-eansr controlledby. the plunger head operating-:meansgto: start-'the' motor' at-za definite;- point-in the-plunger-head-cycle;- and a third switch-means controlled by said motorop erated' rotary member *to'con-trol the-duration of an= operation-, -saidthird (switch means 1 being efi fective to-disable theimotor-at the endofthe first half cyclewf -the= table forthe remainder of the current cyole of the plunger-head; then in conjunction with -thesecondswitch means to start the-motor again. at' thesame point in--the ensuingflplungerheadcycle at which the-'firsthalf cycle of- -the tablewas started; andfinallyto disable the-motor at-the endof'thesecond half cycle of. the table-w 9.-A-die press comprising, in combination, a plunger head astack-table, a-rotary driver for continuously. operating the plunger head. in accordance. with. a prescribed cycle, means for mechanically operating-the. stackltable at the will-. of theoperator through a single "prescribedcyole'in which the .table; is caused-to travel firstin-one=direction Ttoca'rry -a; stack from; aloading position into a! position :under the plunger head; saidtable operating-means-- comprising a source of electrical energy; a- 'tableroperating motor, a 7 motor: switclrfor controlling energization ofthe motor, a motor-switcl-i-operatingxelectromagnet, circuit-means controlling-the:connection. of. the electromagnet to'the sourceof electrical energy comprising a driver-operated switch andra -manually tresponsi-ve-switch; saidsswitchesnbeingcon nected inseriesWith'Jthe electromagnet andiwith' one'another, thee last-named switch arrangedto be olosed atthe will of-theaoperator;'whenthe motorisrini thenormaliidleconditiom; sothat the circuit meanstcanbeclosedito energize 'the motor switch "operatingrelectromagnetfbyi the closing of the driver operated switch, switch-mea-ns-in-- parallehwithithe manuallyc'responsive switch arrangedito-be'aoperated1to;closed: condition bythe r ea-32o motorforreplacing the manually responsive switch; motor operated means for disabling the manually responsive switch, and switch means in parallel with the driver operated switch and operated by-the motor for controlling the continuation and termination of the motor operation'; 1

10. A -die presscomprising, in combination, a plunger head, a stack table, a rotary driver for continuously operating the plunger head in accordance with a prescribed cycle, means for mechanically operating the stack table at the will of theoperator through a single prescribed cycle-in which the table is caused to travel first in one direction to carry a stack from a loading position into a position-under the plunger head, then to rest, and then to travel in the opposite direction to return thestack to the original position, said table operating means comprising a ;-source; of electrical ener y, a table operating motor,- a-motor switch for controlling energizetion-- of themotor, a motor-switchoperating. electromagnet circuit means controlling the cone nectionof the electromagnet tothe source of electrical energy comprising a driver operated switchand a-manually-responsive switch, said switchesbeing connected series with the electromagnet and'with-one another; the last named switcharranged to be-closedat the will of the operator when the motor isin'the normal'idle:

condition, so that the-circuit means-can be closed to energize -the-- motor switch operating 'electromagnet -by the closing ofthe driver operated switch,- switch meansin parallel with the man ually responsive switch; arranged tobe operated to closed condition by the motor for replacing the manually responsive switch, motor operated means --for disabling the manually responsiveswitoh; switch means connected in parallel with the driver operated switch-and operatedby the motor-for replacing the driver operated switch to continue the motor in operation for a first half cycle and then to open-circuit the motorswitch operatingelectromagnet, and for thereafter replacing: the driver operated switch a second time to continue the motor in operation -for a second half cycle-and thentoopen circuit the motor switchoperating electromagnet with all the motor operated parts in original conditions.

11. A -die press comprising, in combination, a plunger head; a stack table, arotarydriverfor continuously operating -theplunger head in accordance with a -prescribed cycle, means for mechanically operating-the stack table. at the will of theoperator through a-single prescribed cyclein which the table is caused to travel first nectedinseries .to'one another; means-for automatically maintaining the manually responsive switchinra closed-condition so=that the motorswit'ch-operating electromagnet will be: energized and the motor switch will be closed upon closing of the'driver operated switch, a motoroperated switch :in parallel with said manually responsive switch for replacing the manually responsive switch after a predetermined period of operation of the motor, and additional motor operated switch means in parallel with the driver operated switch for causing the motor operation, once initiated, to be continued for a half cycle, then to be interrupted until the driver operated switch is closed a second time, then again to be continued for a second half cycle, and similarly to be interrupted with all the motor operated parts in their original conditions.

12. A die press comprising, in combination, a plunger head, a stack table, a rotary driver for continuously operating the plunger head in accordance with a prescribed cycle, means for mechanically operating the stack table at the will of the operator through a single prescribed cycle in which the table is caused to travel first in one direction to carry a stack from a loading position into a position under the plunger head, then to rest, and then to travel in the opposite direction to return the stack to the original position, said table operating means comprising a source of electrical energy, a table operating motor, a motor operating switch for controlling energization of the motor, a first circuit means comprising three successive sections connected in series, the first including a driver operated switch, and motor operated switch means connected in parallel; the second including a magnetically controlled switch and a second motor operated switch means in parallel therewith; and the third comprising a motor-switch-operating electromagnet; a second or auxiliary circuit means in parallel with the first circuit means comprising three successive sections connected in parallel, the first including a third motor operated switch means which remains closed at the conclusion of a complete motor cycle; the second including an auxiliary electromagnet for operating the magnetically controlled switch of the first circuit means; and the third including a manual switch, and a stick switch connected in parallel therewith and operated by the auxiliary electromagnet; and means operated by the motor for operating and timing the three motor operated switch means to cause the first motor operated switch means to close while the driver operated switch is closed, to cause the second motor operated switch means to close during the first half cycle of motor operation, to cause the first and third motor operated switch means to be opened at the conclusion of the first half cycle of motor operation, to cause the first motor operated switch means to close during a second closed period of the driver operated switch, and to open at the conclusion of a second half cycle of motor operation, and to cause the second motor operated switch means to open and the third to close during the second half cycle of the motor operation.

13. A die press comprising, in combination, a plunger head, a stack table, a rotary driver for continuously operating the plunger head in accordance with a prescribed cycle, means for mechanically operating the stack table at the will of the operator through a single prescribed cycle in which the table is caused to travel first in one direction to carry a stack from a loading position into a position under the plunger head, then to rest, and then to travel in the opposite direction to return the stack to the original position, said table operating means comprising a source of electrical energy, a table operating motor, a motor switch for controlling energization of the motor, a motor-switch-operating electromagnet; a first circuit means controlling the connection of the electromagnet to the source of electrical energy comprising a magnetically controlled switch, and a switch operated by the driver, said switches being connected in series with one another and with the motor-switchoperating electromagnet; auxiliary circuit means inparallel with the first circuit means comprising a first motor operated switch means, a manually operated switch normally biased to open position, and an auxiliary electromagnet for operating the magnetically controlled switch of the first circuit means, all in series with one another; an auxiliary stick switch connected in parallel with the manual switch and operated to closed position by the auxiliary electromagnet, whereby closing of the manual switch with the first motor operated switch means in closed condition is caused to energize the auxiliary electromagnet and to maintain such energization so long as the first motor operated switch means remains closed, and the auxiliary electromagnet is caused in turn to hold the magnetically controlled switch of the first circuit means closed for a like period to make the closing of the first circuit means and the starting of the motor dependent upon the closing of the driver operated switch; a second motor operated switch means connected in parallel with the driver operated switch for replacing the latter switch in the first circuit means to maintain the motor in operation for substantially a half cycle each time the latter switch performs its circuit closing function, a third motor operated switch means connected in parallel with the magnetically controlled switch of the first circuit means and arranged to be operated to closed position during a portion of the first half cycle of motor operation and all of the second half cycle,

and efiective when closed to render the closin of the first circuit means and the restarting of the motor independent of the auxiliary circuit means but again dependent upon the closing of the driver operated switch, whereby the second operation of the motor will be initiated upon a second closing of the driver operated switch and will be maintained for a half cycle, and means operated by the motor for controlling and operating the several motor operated switches to cause the complete cycle of operations to be carried out and the motor to be arrested with the parts in their original condition.

14. A die press comprising, in combination, a plunger head, plunger head operating means including a continuously rotary member for continuously reciprocating the plunger head, a stack supporting table cooperative with the plunger head to carry a stack of sheets to and from the die cutting position beneath the plunger head, means for operating the table at the will of the operator and in timed relation with the operation of the plunger head, comprising means controlled by the operation of the plunger head operating means to control the time at which the table is set into operation, means operated by the table operating means itself to control the dura- 7 tion of such operation, and manual control means for selecting the cycle of the plunger head in I which an operation of the table will be begun.

ABRAHAM NOVICK. DANIEL NOVICK. 

